Bed-spring



F. KARR.

BED SPRING. APPLICATION FILED AUG.5, 1918. RENEWED FEB. 4. 1921.

1,388,263. Patented Aug. 23, 1921.

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' rumors KARE, or HOLLAND, MICHIGAN.

BED-SPRIN G.

Specification of Letters Patent.

Patented Au 23, 1921.

Application filed August 5, 1918, Serial No. 248,459. Renewed February 4, 1921. Serial No. 442,596.

To all whom it may. concern:

Be it known that I, F RANCIS KARR, a citizen of the United States, residing at Hol land, in the county of Ottawa and State of Michigan, have invented certain new and useful Improvements in Bed-Springs, of which the following is a specification.

My invention relates to improvements in bed springs, and its objects are :first, to dispense with the use of tie rods such as are used in ordinary spiral spring bed bottom construction; second, to provide a means whereby the greatest flexibility between coils is attained with the least complication of construction; third, to provide a means whereby the surface coils in spiral spring bed construction may be interwoven and interlocked to form a closely linked, very strong and flexlble surface, and, fourth, to provide a means whereby the weight of the spring structure will be reduced to the minimum while the flexibility and strength of the structure will be raised to the maximum.

,1 attain these objects by the construction shown in the accompanying drawing, in which Figure 1 is a planof a surface coil with the connecting elements of adjacent coils shown. Figs. 2'and 3 are modified forms of connecting elements showing the preferable forms of construction between adjacent surface coils in the border rows of the structure, and, Fig. 4 is a plan of the surface coils in the makeup of the border rows, and of one coil as used in the surface within the border rows, that is, throughout the interior 0r non-border rows.

Similar reference characters indicate similar parts throughout the several views.

In the construction of this spring it is desirable to provide a different connecting construction for theborder and the body of the spring surface, as indicated in Fig. 4, in which 1 indicates a body spring surface coil, 1' indicates the plain border coils and 1" indicates a corner spring coil. The corner coil should be made with a connecting hook 3' and a connecting crimp 2" so arranged that the connecting hook of one coil will be made "to engage with, and freely clamp aroundthe crimp on the adjacent coil, as shown at the relatively upper side, the relatively right hand side of the coil 1". The free end of this coil is carried around and knotted to the coil wire, as at b. The

plain border coils are, also, provided with the connecting hook 3' and the connecting crimp 2", or other like device for pivotally connecting these coils, but the free ends of these coils are projected outwardly and have hooks 4' formed so they may be made to engage the rings or loops 4 on adjacent coils.

The body, or inner, coils of the surface construction in the assembled springs are provided with two horizontal rings, 3, adjacent to each other, a vertically disposed ring 2 at one side, and ahook 4 at the end of the coil wire. The vertically disposed rings 2 are left open at a, 0,, sufiiciently to allow the adjacent horizontally disposed ring 3 to be readily passed through to form. the

connections shown in Fig. 1, and the hook By this means, it is plain tosee,

It is not necessary that the crimp forma--' tion shown at 2 be used in this construction, as the offset form shown at 2 is equally eflicacious and much more easily formed, and

several other forms ofconnection may be.

used, but I prefer the crimp and hook as shown in Figs. 2 and 4.

Whenassembling the center coils, either with the border coils, or with the other center coils, the horizontally disposed ringsare passed over the end of the hooks 4 and along the coil to the point a where they are made to enter the vertically shown, and as hereinbefore described.

What I claim as new in the art, is:

1. In spiral spring bed bottom andcushion construction, border surface ,c'oils flexibly interlinked, and central coils interlinked with the border coils and with each other by means of horizontally disposed eyes engaged with vertically disposed eyes forming a strong, light, flexible surface construction.

2. In spring bed bottom and cushion construction, surface coils having eyes or rings horizontally disposed on two sides and vertically disposed on two sides of each surface disposed ring, as

coil all so arranged that the horizontal rings on one surface coil may be interlinked with the vertical rings on adjacent surface coils throughout the surface construction of the springs.

3. In spring bed bottom construction, a border row of coils having integral pivotal connecting elements radiating from three sides thereof, corner coils having two in-- tegral pivotal connecting elements radiating at right angles, and body coils each having two integral horizontally disposed rings, and two integral vertically disposed rings all arranged so each coil may be pivotally connected directly with all adjacent coils to form a flexible surface construction for spiral spring bed bottoms.

4. In a spring bed bottom or the like, in combination, a series of wire rings normally lying in a common plane and each comprising the terminal coil of a helical spring, each of the ringsvbeing provided with radially projecting eyes formed from the wire of which the ring is composed and the eyes of adjacent rings being interengaged.

Signed at Grand Rapids, Michigan, Jul 18, 1918.

FRANCIS KARR. 

